Nanoscale HZSM-5 and microscale HZSM-5 were characterized by NH 3 -TPD, XRD, SEM and N 2 adsorption. The catalytic performance of the disproportionation of toluene, the alkylation of toluene with methanol and the cracking reaction of 1,3,5-TMB and 1,2,4-TMB were investigated. The similar reactivity
Catalytic reactions of tetralin on HZSM-5 zeolite
β Scribed by A.T. Townsend; J. Abbot
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 872 KB
- Volume
- 95
- Category
- Article
- ISSN
- 0926-860X
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β¦ Synopsis
Studies of catalytic reactions of tetralin on HZSMd at 400Β°C
show that this feedstock is much less reactive on the pentasil compared to reaction on HY. At low feedstock conversions, thermal products contributed a large proportion of the total product species observed. Eight initial catalytic products were determined on HZSM-5, compared with approximately 20 found on the faujasite under similar conditions. As previously found for the HY zeolite, naphthalene, methylindans and benzene were the major initial products formed on HZSM-5. Even though a small number of initial catalytic products were formed on the pentasil, a complete network of initial reaction pathways could still not be clearly determined.
π SIMILAR VOLUMES
The high shape selectivity of HZSM-5 zeoiite catalyst is affected strongly by the intracrystalline diffusivities of reactants and products. Carbonaceous materials, called coke, are deposited on the zeolite catalysts during reactions, resulting in the change in the magnitude of the diffusivity. The d